<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <style>
        .shade{
            position:fixed;z-index:1040;top:0;left:0;right:0;bottom:0;background-color:#999;filter:alpha(opacity=50); -moz-opacity:0.5;opacity:0.5;
        }

        .loading{
            position:fixed;z-index:1050;top:40%;left:50%;height:32px;width:32px;margin:0 0 0 -16px;background:url(../img/loading.gif);
        }
    </style>
</head>
<body>


    <!-- 遮罩层开始 -->
    <div id='shade' class='shade'></div>
    <!-- 遮罩层结束 -->
    <!-- 加载层开始 -->
    <div id='loading' class='loading'></div>
    <!-- 加载层结束 -->


</body>
</html>